How severe is CVE-2021-44622?

CVE-2021-44622 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-44622 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44622?

CVE-2021-44622 affects Tp-link Tl-wr886n Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-44622?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-44622 published?

CVE-2021-44622 was published on 2022-03-10 and last updated on 2026-06-17.

CVE-2021-44622

CVE-2021-44622 is a critical-severity vulnerability in Tp-link Tl-wr886n Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Tp-link Tl-wr886n Firmware
Published: 2022-03-10
Last modified: 2026-06-17

Description

A Buffer Overflow vulnerability exists in TP-LINK WR-886N 20190826 2.3.8 in the /cloud_config/router_post/check_reg_verify_code function which could let a remove malicious user execute arbitrary code via a crafted post request.

Frequently asked questions

What is CVE-2021-44622?: A Buffer Overflow vulnerability exists in TP-LINK WR-886N 20190826 2.3.8 in the /cloud_config/router_post/check_reg_verify_code function which could let a remove malicious user execute arbitrary code via a crafted post request.
How severe is CVE-2021-44622?: CVE-2021-44622 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-44622 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44622?: CVE-2021-44622 affects Tp-link Tl-wr886n Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-44622?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-44622 published?: CVE-2021-44622 was published on 2022-03-10 and last updated on 2026-06-17.

References

https://github.com/Yu3H0/IoT_CVE/tree/main/886N/chkRegVeriRegister

Affected products (1)

cpe:2.3:o:tp-link:tl-wr886n_firmware:20190826_2.3.8:*:*:*:*:*:*:*

More vulnerabilities in Tp-link Tl-wr886n Firmware

CVE-2023-46539 — Critical (CVSS 9.8): TP-LINK TL-WR886N V7.0_3.0.14_Build_221115_Rel.56908n.bin was discovered to contain a stack overflow via the function…
CVE-2023-46538 — Critical (CVSS 9.8): TP-LINK TL-WR886N V7.0_3.0.14_Build_221115_Rel.56908n.bin was discovered to contain a stack overflow via the function…
CVE-2023-46537 — Critical (CVSS 9.8): TP-LINK TL-WR886N V7.0_3.0.14_Build_221115_Rel.56908n.bin was discovered to contain a stack overflow via the function…
CVE-2023-46536 — Critical (CVSS 9.8): TP-LINK TL-WR886N V7.0_3.0.14_Build_221115_Rel.56908n.bin was discovered to contain a stack overflow via the function…
CVE-2023-46535 — Critical (CVSS 9.8): TP-LINK TL-WR886N V7.0_3.0.14_Build_221115_Rel.56908n.bin was discovered to contain a stack overflow via the function…
CVE-2023-46534 — Critical (CVSS 9.8): TP-LINK TL-WR886N V7.0_3.0.14_Build_221115_Rel.56908n.bin was discovered to contain a stack overflow via the function…

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